A screen is placed 
from an object. The image is formed by using a convex lens twice on the screen by putting the lens at two different locations separated by 
. The focal length of the lens is approximately equal to
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Separation between object and screen 
and lens displacement, 
Since, 
where, 
is focal length
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